From: bluhm <bluhm@openbsd.org>
Date: Tue, 13 Aug 2024 20:48:00 +0000 (+0000)
Subject: For AMD SEV use correct command mask in ccp(4) driver.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=5f28fd1bdf96ecaba7708fd1bc168a735b082b50;p=openbsd

For AMD SEV use correct command mask in ccp(4) driver.

According to AMD SEV API specification, the mask for command ID is
supposed to be of length 10 (Bits [25:16]), rather than length 6.
This ensures that all commands are properly processed by the PSP.

from Aaron Debebe; OK hshoexer@
---

diff --git a/sys/dev/ic/ccp.c b/sys/dev/ic/ccp.c
index 79650a6c63a..5981ae43450 100644
--- a/sys/dev/ic/ccp.c
+++ b/sys/dev/ic/ccp.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: ccp.c,v 1.5 2024/06/13 17:59:08 bluhm Exp $ */
+/*	$OpenBSD: ccp.c,v 1.6 2024/08/13 20:48:00 bluhm Exp $ */
 
 /*
  * Copyright (c) 2018 David Gwynne <dlg@openbsd.org>
@@ -228,7 +228,7 @@ ccp_docmd(struct ccp_softc *sc, int cmd, uint64_t paddr)
 
 	plo = ((paddr >> 0) & 0xffffffff);
 	phi = ((paddr >> 32) & 0xffffffff);
-	cmdword = (cmd & 0x3f) << 16;
+	cmdword = (cmd & 0x3ff) << 16;
 	if (!cold)
 		cmdword |= PSP_CMDRESP_IOC;